Author Topic: Power Valve Operation???  (Read 267 times)

Offline MotorGeek - Jerry Hall

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Re: Power Valve Operation???
« on: September 03, 2020, 03:49:16 pm »
Been searching and can't seem to find any info on how the power valve works on these engines...specifically how the gear driven governor makes the valve close at upper RPMs.....I've heard different oil viscosities and temperatures can change the RPM the valve closes as well?

Also is there a general RPM setting the PV should close at??? I've heard 5800RPM on the 500's but nothing on the 250's.Obviously the pipe/engine combination will have some affect but just looking for a general starting point......Just trying to educate myself on the operating theory and gain some info.Thanks

 6300 to 7000 rpm on the Lt250rs is range for LT250s.  The Power valve closing RPm point depends upon the porting and pipe combination.


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